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Thermodynamics - compression of a gas in a piston-cylinder device

  1. Sep 30, 2007 #1
    1. The problem statement, all variables and given/known data

    An ideal gas initially at 100kPa and 300K is contained in a piston-cylinder device with an initial volume of 5 liters. The gas is then compressed slowly according to the relationship that pV^2=constant until a final temperature of 400K is reached. Sketch the process on a p-V diagram and find how much work is done in this process.

    2. Relevant equations
    pV^2=costant


    3. The attempt at a solution

    I'm not sure in my logic but since this is a freely moving piston-cylinder device, the work should be 0 which would result in a horizonatal line. Is this assumption correct?
     
  2. jcsd
  3. Oct 1, 2007 #2

    chemisttree

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    No. Review the definition of work as it pertains to pressure and volume changes.
     
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